A study on required volume of superconducting element for flux flow resistance type fault current limiter

Shimizu, Hirotaka; Yokomizu, Yasunobu; Goto, M.; Matsumura, Toshiro; Murayama, Norimitsu

doi:10.1109/tasc.2003.812982

Cited by 41 publications

(37 citation statements)

References 6 publications

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“…But (1), in its original form, applies to solids, not to a network of solid particles surrounded by weak-link shells; the comparatively large ρ FF thus does not necessarily indicate strong flux pinning. The resistivity ρ FF is also larger than the constant ρ FF = 10 −6 m used in [4]; it is not at all clear that ρ FF should be constant, independent of temperature. Thermal diffusivity, D T , of a YBaCuO superconductor solid material (with conductivity from [17]) is between 4 10 −6 and 2 10 −6 m 2 /s, at temperatures of 77 and 120 K, respectively.…”

Section: Data Inputmentioning

confidence: 90%

“…in [3][4][5]; there are more numerous reports that apply the same simplifying assumption. But there are another four shortages of traditional stability models:…”

Section: Surveymentioning

confidence: 99%

“…The bundle is integrated into an electrical circuit (Fig. 1a) that allows comparison with a similar system described in [4] with same root mean square phase voltage, same conductor cross section and same critical current density. We could in principle take any large-or small-scale electrical grid, like in a laboratory experiment, with an appropriately dimensioned superconducting component; the point is the analysis of this component under high current load.…”

Section: Surveymentioning

confidence: 99%

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Superconductor Stability Against Quench and Its Correlation with Current Propagation and Limiting

Reiss

2015

J Supercond Nov Magn

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This paper presents a numerical (finite element) analysis of superconductor stability and current propagation under random variations of critical superconductor parameters. Instead of using singular (homogeneous) values, random variations potentially are appropriate to take into account any conductor inhomogeneity that can be considered as an obstacle to current propagation. Traditional assumptions like homogeneous current distribution, critical temperature, critical current density and critical magnetic fields are not justified in general; a local disturbance (for example, release of mechanical stress energy), if not immediately distributed by solid conduction, would generate a transient increase of local conductor temperature. Local critical current density and magnetic field then will be reduced, and current distribution will change. Disturbances may arise also from transport currents that locally exceed the critical current of the superconductor. Disturbances of all kinds may increase the conductor temperature above its critical value. A local analysis of all superconductor states thus is mandatory to safely avoid a quench. As an extension of standard stability models, also flux flow resistive states are taken into account. We will try to find a possibly existing correlation between current propagation and superconductor stability. Fault current limiting is discussed as a special case of current propagation. The analysis is applied to a bundle of high-temperature superconductor (HTSC) filaments. As will be shown, temperature profiles in a superconductor do not allow a clear distinction between Ohmic resistive or flux flow resistive fault current limiting. Though frequently made in the literature, this separation is highly questionable, because Ohmic resistive and flux flow resistive states may locally coexist, side by side, but are not very stable in the superconductor volume.

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Section: Data Inputmentioning

confidence: 90%

“…in [3][4][5]; there are more numerous reports that apply the same simplifying assumption. But there are another four shortages of traditional stability models:…”

Section: Surveymentioning

confidence: 99%

Section: Surveymentioning

confidence: 99%

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Superconductor Stability Against Quench and Its Correlation with Current Propagation and Limiting

Reiss

2015

J Supercond Nov Magn

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“…Normal conducting state at a temperature above the critical value. In flux state, the flux resistance depends on the HTS temperature (T) and the instantaneous value of current density (J) [23,24].…”

Section: Modeling Of Resistive Sfclmentioning

confidence: 99%

Feasibility Study of Centralized Multi-agent Self-healing Power System with Superconducting Fault Current Limiter

Sujil

Agarwal

Kumar

2016

Technol Econ Smart Grids Sustain Energy

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Recently, self-healing power systems have evolved towards centralized instructions and control functions. This paper delineates the feasibility analysis of self-healing power systems using Multi-Agent System (MAS) with Superconducting Fault Current Limiter (SFCL). For a complex power system included various microgrid, it is conceivably doubtful to expect that centralizing the aggregate system control function is practical. Hence, this paper is especially keen on settling on online decision by using smart microgrid control agents that collaborate during normal and fault situations. The control decision is taken by all agents which are deployed at different parts of the circuit. These agents collect their respective circuit information and send to the main central agent. Super conducting fault current limiter is an innovative electric equipment which has the ability to limit peak value of fault current within the first cycle of the fault current. However, a scarcity of research regarding the implementation of SFCL with the multi-agent system in a micro grid is felt. The centralized MAS with SFCL exposed in this paper help to support an enabling technology of future self-healing

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“…Practically, HTS fault current limiters (FCLs) have been classified into the resistive, inductive, and hybrid types [154][155][156]. In the three mentioned types of SFCL, the resistive type can protect the system against the fault current instantaneously by a considerable The RSFCL is based on superconducting bars or double non-inductive spirals for effective elimination of inductance [155].…”

Section: Electro-thermal Modeling Of a Resistive Sfclmentioning

confidence: 99%

Analysis and Modeling of Advanced Power Control and Protection Requirements for Integrating Renewable Energy Sources in Smart Grid,

Moghadasiriseh¹

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A study on required volume of superconducting element for flux flow resistance type fault current limiter

Cited by 41 publications

References 6 publications

Superconductor Stability Against Quench and Its Correlation with Current Propagation and Limiting

Superconductor Stability Against Quench and Its Correlation with Current Propagation and Limiting

Feasibility Study of Centralized Multi-agent Self-healing Power System with Superconducting Fault Current Limiter

Analysis and Modeling of Advanced Power Control and Protection Requirements for Integrating Renewable Energy Sources in Smart Grid,

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